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Theory of Machine

Theory of Machine
Elements of pairs held together mechanically is known as

Closed pair
Mechanical pair
Open pair
Rolling pair

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Theory of Machine
The example of successfully constrained motion is a

All of these
Motion of an I.C. engine valve
Motion of the shaft between a footstep bearing
Piston reciprocating inside an engine cylinder

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Theory of Machine
The example of rolling pair is

Lead screw of a lathe
Ball and socket joint
Ball bearing and roller bearing
Bolt and nut

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Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

Smaller OR Larger
Smaller
None of the listed here
Larger

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Theory of Machine
In a kinematic chain, a quaternary joint is equivalent to

Three binary joints
Two binary joints
One binary joint
Four binary joints

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Theory of Machine
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is

3π Hz
6π Hz
6 Hz
3 Hz

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